Abstract
A new species of Thelypteris subgenus Goniopteris (Thelypteridaceae) is described and illustrated: Thelypteris amazonica Salino & R. S. Fernandes is apparently most similar to Thelypteris anoptera (Kunze) C. Chr. (Brazil-Bahia) and T. abrupta (Desv.) Proctor (Antilles, Central America, South America), but differs from both by the clavate vein ends, basal vein pairs from adjacent segments not united below the sinuses, and petioles with simple and stellate hairs. Thelypteris amazonica is known only from Amazonian Brazil.
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